Fuel and air mixer



Nov. 11, 1924- E. w. PUFFER FUEL AND AIR MIXER r'uea May ,12, 19-24 Patented Nov. 11, 1924.

"UNITEDHSTATES [EDMUND w. rurrna, or wauxnsna, WISCONSIN.

rum. AND AIR, mixes Application flied May 12,

To all whom it may concern:

Be it known that I, EDMUND W. PUFFER, a citizen of the United States, residing at Waukesh'a, in the county of Waukesha and -State of Wisconsin, have invented certain new and useful Improvements in Fuel and Air Mixers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others 1 skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in devices adapted to be secured between the carbureter and intake manifold of a liquid 1 fuel engine, for the purpose of promoting thorough mixture of the air and fuel vapor fed to the engine cylinders. I am aware that numerous devices have been designed for this general purpose, but it is the object of my invention to provide one of extreme simplicity, yet a device which will be unusually efficient for producing a most thorough mixture of the air and fuel vapor, thus effecting a saving in fuel, giving more power N to the motor, practically preventing carbon deposits, and preventing any liquid fuel from passing the pistons and diluting the oil in the crank case.

With the foregoing in view, the invention a resides in the novel subject matter hereinafter described and claimed, the descriptionbeing supplemented by the accompanyingrdrawmg.

igure 1 is a longitudinal sectional view '6 of the outlet neck of a carbureter, the inlet end of an intake manifold, and the invention secured between the two.

Figure 2 is a transverse sectional view as indicated by line 2-2 of Fig. 1. 40 Figure 3 is an elevation of the invention lookin in the opposite direction from Fi 2.

Int e drawing, N designates a car ureter outlet neck, I has reference to the intake manifold, F refers to the usual attaching flanges of the carbureter and manifold, and B designates the bolts passing through said flanges.

My invention which is secured between the neck N and intake manifold 1, comprises 5 a thick, solid block 1 which is preferably a castin having the same outline as the flanges said block having opposite flat siides 2 and 3, k G f b1 a ropriate gas ets are pre era y used 'lhese gaskets are of well known form between which and the flanges 1924. Serial No. 712,762.

and are provided with openings alining with bolt holes in the block 1 andthe flanges F, so that. the bolts B may pass through all parts and tightly clam them together.

A plurality .of gas con ucting openings are formed through the block 1, said openings having small inlet ends and being gradually increased in diameter toward their outlet ends. Thus, all air and fuel vapor passing through the openings may gradually expand as it reaches the discharge ends thereof and such expansion promotes thorough mixture of the vapor and air, to produce a highly volatile 1gas for passage to the engine cylinders. n the construction shown, the openin s above referred to decrease in diameter rom the carbureter side2 of the block 1, for short distances compared with the length of the openings, as indicated at 4. Then, for short distances, the openings have uniform diameters 5, and from these diameters, the openings gradually increase in diameter as indicate at 6, so as to provide funnel-shaped discharge ends. The gas and air drawn from the carbureter through the openings, is compressed by the tapere inlets 4 thereof, bringing the atoms of fuel vapor and the air into most intimate contact. Then, as this compressed mixture is drawn through the flared outlet ends 6 of the openings, it graduall expands and such thorough mixing takes p ace that a relatively dry gas is fed to the engine cylinders. This gas adds greatly to the efficiency of the engine, and as it is rather dr no liquid fuel accumulates along the wa s of the intake manifold, with the danger of back-firing. Moreover, no liquid fuel reaches the engine cylinders to form carbon deposits therein or to leak and seriously dilute the ln ricating oil in the crank case. Furthermore, overheating of the engine is prevented by supplying the proper fuel mixture thereto, and much better results may be obtained in every way. For instance, ordinary four cylinder motors can be operated in high gear without bucking or back-firing, ling an automobile at about two miles per hour, and from this slow speed, in high gear, rapid acceleration may be obtained to maximum speed considerably greater than possible with the ordinary car uretion, Hence, the invention is not only well adapted for use with automobiles for general purposes,

past the pistons when only propeling formed; Wiih bolt holin its ends from one fiat side to the other and also having :1 pliirsliz of fuel conducting openings from solid one fist side in the oeher, said openings decreasing in diameter from their ends for short distances to compress the air and fuel vapor drawn iherethrough, being then of uniform diamewr throughout short poi-sinus of their lengths, and then gradueliy increasing in diameter to their outlet ends to sense gradual expansion oi the air and. fuel vapor, promoting thorough mixi-i'zre thereof, said openings forming the sole fuel conducting means from the carburetor side of the block to the manifold side thereoi said block being imperforate with the exception of said bolt holes and openings In testimony whereof I have hereunto effixed my signature.

EDMUND W. PUFFER. 

